Waze lets Facebook users track friends who are driving to the same destination. "Coordinate everyone's arrival times when you pick up or meet up with friends," Waze says on its website.

Users can also share information about local gas prices, and direct Waze users to stations with the lowest prices.

Industry analysts are split on whether Google needs Waze to add social capabilities to its Maps app. Some speculate that Google is simply looking to delay the Facebook negotiations, and to boost the Waze price.

For instance, Patrick Moorhead, an analyst with Moor Insights & Strategy, said Google's likely goal is to "disrupt the deal and force Facebook to pay a higher price than they would have paid. Google doesn't need another mapping service, as was demonstrated at Google I/O. There's no love lost between Facebook and Google . This is just one tactic in the high-stakes world of the Internet."

"Google already has real-time traffic capabilities by tracking everyone who uses Google Maps while driving," Moorhead added. "The only thing Waze brings to Google is driving gamification, where drivers note accidents and police. That's not worth $1 billion. If you are Facebook without any real-time mapping feature, then that is a big issue."

Zeus Kerravala, an analyst with ZK Research, said Google could use some help in social networking.

"Once users get reliant on Waze to help them get to work, etc., they might spend more time using Google Search or Google+," he said. "Google could probably build this themselves but this gives them a platform that's already built and it also keeps the mapping app out of Facebook's hands."